Install & launch errors
Programs that fail to install, update, uninstall or start on Windows.
- Installer error 1603: "A fatal error occurred during installation" and how to fix itError 1603 is the generic Windows Installer code for "something failed fatally, so the install was rolled back." It is a catch-all, so the fix depends on the cause. Start with the quick checks (already installed, folder and drive choice, SYSTEM permissions), then read a verbose log to find the real culprit.
- Installer error 2503 "Called RunScript when not marked in progress": how to fix itError 2503 is a Windows Installer (MSI) error that usually appears together with error 2502. It means the installer could not set up its install session, most often because it ran without administrator rights and could not write to a system folder. Running the installer as administrator fixes it in many cases; if not, re-register Windows Installer and check folder permissions.